package com.guo.boot.study.syn;

/**
 * @Auther Heart Guo
 * @Date 2021/12/23-16:22
 */
/*
    死锁：多个线程互相抱着对方需要的资源，然后形成僵持
* */
public class DeadLock {
    public static void main(String[] args) {
        Makeup m1 = new Makeup(0,"张三");
        Makeup m2 = new Makeup(1,"李四");

        m1.start();
        m2.start();
    }
}

//口红
class Lipstick{

}

//镜子
class Mirror{

}

class Makeup extends Thread{
    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice;//选择
    String name;//使用的人

    Makeup(int choice,String name){
        this.choice = choice;
        this.name = name;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    //化妆,互相持有对方的锁，就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if(choice==0){
            synchronized (lipstick){//获得口红的锁
                System.out.println(this.name+"获得口红的锁");
                Thread.sleep(1000);

            }
            synchronized (mirror){//一秒钟后想获得镜子的锁
                System.out.println(this.name+"获得镜子的锁");
            }
        }else {
            synchronized (mirror){//获得镜子的锁
                System.out.println(this.name+"获得镜子的锁");
                Thread.sleep(1000);

            }
            synchronized (lipstick){//一秒钟后想获得口红的锁
                System.out.println(this.name+"获得口红的锁");
            }
        }
    }

}